Your package kontact failed to build from source in current F28. https://koji.fedoraproject.org/koji/taskinfo?taskID=24809854 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
A build was successfull: kontact-17.12.3-1.fc28 An update was found in bodhi: account-wizard-17.12.3-1.fc28 knotes-17.12.3-1.fc28 kontact-17.12.3-1.fc28